A full buffer was not returned. Try again.

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Hi, using Raspberry Pi Zero with DHT11 sensor and I am observing this issue: “A full buffer was not returned. Try again.” after running dht_simpletest.py. I edited values to match DHT11 and P4 (i use)

dhtDevice = adafruit_dht.DHT11(board.D4)

I tested the sensor using the old library and it works (90+ % succ read rate), but using the new library I can barely make one successful request. Also I tried to increase sleep period to 5 sec with no result.

How should I troubleshoot this?

Issue Analytics

State:
Created 4 years ago
Comments:42 (1 by maintainers)

Top GitHub Comments

1reaction

bloslooscommented, Feb 13, 2021

Same error here, continuously A full buffer was not returned. Try again. Will this be fixed in the future? However, 40% of readings at a rate of 1 per sec work with old library.

1reaction

grigalcommented, Feb 9, 2021

I’m getting the same errors A full buffer was not returned. Try again. and less frequently Checksum did not validate. while measuring every 60 seconds (with use_pulseio=False).

Raspberry Pi 3b Linux piberry 4.19.68-v7+ #1255
3-pin DHT22 sensor
adafruit-circuitpython-dht==3.5.4
Running on a docker image, python 3.8.7

I used to use the old library, but as it was deprecated I decided to switch to this one. Hope this will be fixed, as I wouldn’t like to use the deprecated one.

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